Opaline Well Project
The Opaline Well Project is located approximately 190 km southeast of Port Hedland and 40km west of Nullagine and consists of a one Exploration Lease (E45/4997) of 67km2. Highly under explored region now attracting mid tiers, such as Greatland Gold, who are actively exploring on adjacent tenure.
The general topographic relief of the Opaline Well project is largely influenced by the bedrock geology and is characterised by low hills with strike-controlled ridges to the east.
Remnants of preserved c. 3020–2920 Ma De Grey Supergroup are preserved in the east of the project, including unconformably overlying clastic metasedimentary rocks of the Gorge Creek Group. Ultramafic rocks intrude the southern area of the Kelly greenstone belt in the southeast of the project. The Coongan and Kelly greenstone belts hosts several small gold prospects and mines in shear zones parallel to, but offset from, the main shears in the area.
Westar considers the project to be prospective for both shear-hosted gold and VMS style base metal mineralisation. Historical rock chip samples in the Project area include 6.32 g/t, 7.95 g/t, 13.7 g/t , 13.22 g/t, 17.0 g/t, 20.5 g/t, 44.6 g/t and 200g/t Au.
An historical base metal rock chip anomaly by Great Southern Mines, adjacent to the historic workings of Opaline Well-2 returned assays of 0.25-1.15% Cu, 0.14-1.85% Zn, 79-155g/t Ag and 0.19-0.41g/t Au. This is proximal to a smaller gravity high with a larger, more substantial gravity anomaly lying to the south-east of Opaline Well-1. There are no records of drilling at this location and the gravity anomaly is untested.
2021 field reconnaissance and rock chip sampling by Westar confirmed gold and base-metal mineralisation at the Triberton Creek Prospect, including 1.3g/t Au in OWR025 and, 0.3 g/t Ag from OWR062 and 218ppm Cu from OWR063. At the Opaline prospect rock chip samples returned 508 ppm Cu, 1,080ppm Zn and 343ppm Pb OWR019.
A follow up airborne EM survey was completed in Q4 CY2021 to rapidly identify discrete conductors representing potential massive sulphide drill targets. Four priority conductors have been identified, of which anomaly 101 is the priority for field reconnaissance and future works programs.
Opaline Well litho-structural interpretation and priority areas of interest
Opaline Well – Regional Geology